Multiple High-resolution Chandra Grating Observations of Her X-1
We present an analysis of multiple high-resolution Chandra grating observations of the X-ray binary pulsar Her X-1. With a total exposure of 170ks, six observations are separated by years and cover three combinations of orbital and super-orbital phases. The study aims to determine the properties of the photoionized emission and its dependence on variations in the spectral continuum during various phases. In this proceeding paper we present some preliminary results with regards to the variable spectral continuum. The continua can be described by a partial covering model which is consistent with the high energy spectra observed with PXTE. In addition, an additional thermal blackbody component is required to fit the soft band below 12 A (~ 1keV). Most of the variability is caused by high absorption columns varying from (1-3)×1023cm-2.
X-ray binaries Her X-1
L. Ji N. Schulz M. Nowak H. Marshall
MIT Kavli Institute for Astrophysics and Space Research
国际会议
紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)
安徽黄山
英文
241-243
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）